Tragedy has struck a music festival in Las Berlanas, Spain. Spanish pop star Joana Sainz García has died after an exploding firework struck her during a concert.

According to El Diario Montañés, the 30-year-old singer was performing with the Super Hollywood Orchestra when she was hit by a cartridge from a pyrotechnic device and was knocked unconscious.

She was taken to a hospital where she was later pronounced dead. The incident happened on the closing night of a four-day festival.

According to reports, close to 1,000 people had gathered for the closing of the festival. A doctor and several nurses were in the audience and tried to help the singer after the incident occurred.

“Nobody can explain it,” group promoter Isidoro López told the local news agency Avila Red. “We have been doing the same [act] for five years.”

Our thoughts and prayers go out to Joana’s friends and family during this difficult time.